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MatroZZZ [7]
3 years ago
9

Marissa wanted a laptop. Best Buy was selling it for $329.00. She had a coupon for 15% off. The sales tax was 8.5%. How much did

Marissa end up spending?
Mathematics
1 answer:
Katena32 [7]3 years ago
5 0

Answer:

you need to divied 15 them subtrac  8.5

Step-by-step explanation:

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A triangle with an area of 202.5 has a height that measures 15 find its base
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The area = 1/2 * base * height

202.5 = 1/2 *  base * 15

measure of the base =  202.5 / (1/2 * 15)

=   27 answer
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3 years ago
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The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 4. Approximately what
harkovskaia [24]

Answer:

78.88%

Step-by-step explanation:

We have been given that

\mu=25,\sigma=4,x_1=20,x_2=30

The z-score formula is given by

z-\text{score}=\frac{x-\mu}{\sigma}

For x_1=20

z_1=\frac{20-25}{4}\\\\z_1=-1.25

For x_2=30

z_2=\frac{30-25}{4}\\\\z_2=1.25

Now, we find the corresponding probability from the standard z score table.

For the z score -1.25, we have the probability 0.1056

For the z score 1.25, we have the probability 0.8944

Therefore, the percent of the trees that are between 20 and 30 years old is given by

0.8944 - 0.1056

= 0.7888

=78.88%

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3 years ago
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Answer: b (-3, 1]

explanation:
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